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From "Navis (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-6105) LongWritable.compareTo needs shimming
Date Thu, 02 Jan 2014 04:54:51 GMT

     [ https://issues.apache.org/jira/browse/HIVE-6105?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Navis updated HIVE-6105:
------------------------

    Assignee: Navis
      Status: Patch Available  (was: Open)

> LongWritable.compareTo needs shimming
> -------------------------------------
>
>                 Key: HIVE-6105
>                 URL: https://issues.apache.org/jira/browse/HIVE-6105
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.12.0
>            Reporter: Gunther Hagleitner
>            Assignee: Navis
>         Attachments: HIVE-6105.1.patch.txt
>
>
> Compiled hive against hadoop-2. Running tests on hadoop 1 gives:
> Caused by: java.lang.NoSuchMethodError: org.apache.hadoop.io.LongWritable.compareTo(Lorg/apache/hadoop/io/LongWritable;)I
> 	at org.apache.hadoop.hive.ql.udf.UDAFPercentile$MyComparator.compare(UDAFPercentile.java:62)
> 	at org.apache.hadoop.hive.ql.udf.UDAFPercentile$MyComparator.compare(UDAFPercentile.java:58)
> 	at java.util.Arrays.mergeSort(Arrays.java:1270)
> 	at java.util.Arrays.sort(Arrays.java:1210)
> 	at java.util.Collections.sort(Collections.java:157)
> 	at org.apache.hadoop.hive.ql.udf.UDAFPercentile$PercentileLongEvaluator.terminate(UDAFPercentile.java:194)
> 	... 20 more
> I think the problem is that the compareTo function has changed from using Object to using
LongWritable as an argument. Seems this needs a shim. However, we should also make sure that
this shim doesn't hit performance too hard.



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